His off-duty wardrobe of cargo shorts and newsboy caps may be infamous, but that’s not stopping Leonardo DiCaprio from jumping into the fashion industry.

The environmentally conscious Oscar winner, 43, has signed on as an investor for sustainable footwear brand Allbirds, which is known for its knit sneakers.

“Creating sustainable consumer products requires a deep commitment from brands that understand the role they have in helping solve our environmental crisis,” DiCaprio said in a statement. “Allbirds is on the forefront of developing new materials that will serve as a model for the footwear industry. This kind of innovation is crucial for creating a more sustainable future. I am proud to join the company as an investor.”

Founded in 2016, Allbirds uses merino wool from New Zealand to make its shoes, along with water-conserving tree fibers and recycled bottles and cardboard. The brand’s latest launch is a $35 flip-flop made from renewable sugarcane rather than the usual plastic foam.

The “Titanic” star is known for his activism: Over the past decade, his Leonardo DiCaprio Foundation has donated over $80M to various environmental causes, from combatting climate change to protecting wildlife.